skip to main content

Title: Experimental observation of crystalline particle flows in toroidal dust clouds

The dust flow in a toroidal dust trap is studied experimentally. The flow is driven by the Hall component of the ion drag force in a magnetized plasma. Dust density waves are found in a torus with a large minor radius a, which allows for several wavelength, 2a>5λ, in the (mostly) radial direction of the ion flow. Beyond an intermediate state with radial sloshing oscillations, a crystalline dust flow with suppressed wave activity could be realized for 2a<2λ. The particles arrange themselves in distinct layers with hexagonal-like local order. Smooth transitions between states with different numbers of layers are found in the inhomogeneous flow.
Authors:
;  [1] ;  [1] ;  [2]
  1. IEAP, Christian-Albrechts-Universität, D-24098 Kiel (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22410463
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CRYSTALS; DENSITY; DRAG; DUSTS; FLOW MODELS; HALL EFFECT; INTERMEDIATE STATE; OSCILLATIONS; PARTICLES; PLASMA